Fixed docstring [skip CI]
Fixed docstring [skip CI]


Former-commit-id: de28c435e13591cb171c1f75b2da0259da7436b3 [formerly a1d320c6f8d7cdb1a76b53f761c07cd694f8305b]
Former-commit-id: eebcdd486c4658de02d2b1a3e586e2318ba00d40
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine